 /*******************************************************************************
  * Copyright (c) 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.core.internal.registry.osgi;

 import org.eclipse.osgi.service.environment.EnvironmentInfo;
 import org.eclipse.osgi.service.resolver.PlatformAdmin;
 import org.osgi.framework.*;

 /**
  * The class contains a set of Equinox-specific helper methods. The methods were isolated
  * into separate class to prevent an attempt to load Equinox classes in a generic OSGi
  * environment.
  *
  * This class uses OSGi services.
  *
  * @since org.eclipse.equinox.registry 3.2.100
  */
 public class EquinoxUtils {

     /**
      * Get the command line arguments from the EnvironmentInfo service
      */
     public static String [] getCommandLine(BundleContext context, ServiceReference ref) {
         if (ref == null)
             return null;
         try {
             EnvironmentInfo environmentInfo = (EnvironmentInfo) context.getService(ref);
             return environmentInfo == null ? null : environmentInfo.getNonFrameworkArgs();
         } finally {
             context.ungetService(ref);
         }
     }

     /**
      * Get the time stamp from the PlatformAdmin service.
      */
     public static long getContainerTimestamp(BundleContext context, ServiceReference ref) {
         if (ref == null)
             return -1;
         try {
             PlatformAdmin admin = (PlatformAdmin) context.getService(ref);
             return admin == null ? -1 : admin.getState(false).getTimeStamp();
         } finally {
             context.ungetService(ref);
         }
     }

     public static ServiceRegistration registerCommandProvider(BundleContext context) {
         // try to register the registry command provider
 try {
             // refer to the CommandProvider by name here so that even if VM
 // decides to pre-fetch all referred classes the expection will occur
 // inside the exception holder
 return context.registerService("org.eclipse.osgi.framework.console.CommandProvider", new RegistryCommandProvider(), null); //$NON-NLS-1$
 } catch (NoClassDefFoundError noClass) {
             // expected if CommandProvider is not available
 }
         return null;
     }
 }

